关键词: 　聚合物驱 , 　地层 , 　解堵 , 　表面活性剂

Abstract: Polymer flooding is widely used in oil fields, and the good result is achieved. However, with the increase of the total polymer injected into the well, the formation is plugged seriously near the injection well, the pressure of injection becomes high, the ability of injection becomes low, the overall situation of injection becomes poor, and ultimately the oil recovery efficiency is influenced by this situation. The strong antioxidant use is a conventional degradation method, the effect is very good, but security risks are existed in the processing of dealing with the oil well. For the above problems, a thought of disposing polymer plug with surfactant was presented. Through the experimental methods, the degradation effect of polymer on various surfactants was analyzed and evaluated, thus a new formula of the water block remover was developed. Through the simulation experiment on core, the effects of water block remover were evaluated, and the results show that the effects are so greatly obvious.

Key words: Polymer flooding , Stratum , Broken down , Surfactant